The 1/2 HP Model N153 nonautomatic Effluent pump with a piggyback variable level float switch is designed to pump sewage effluent in septic systems and to pump elevator sump water. It is constructed of cast iron with a durable powder-coated epoxy finish to reduce corrosion, making it ideal for most septic system pump tanks. The Model N153 works well in residential and light commercial applications and is a desirable choice for longevity. Backed by a one-year warranty, every pump is submerged and water tested to provide years of trouble-free performance.